Episode Art Not Importing

I’m using the plugin to import an existing podcast from another RSS feed. When I do the import, everything seems fine except none of the artwork associated with the episodes comes through.

Is there a way to fix this? I have custom artwork for each episode and would love to use that.

I have already confirmed that the artwork link in my RSS feed works. I also made sure that the image is a perfect square and in a good size.

Any help is appreciated!